Pivot hinge

ABSTRACT

A concealed pivot hinge includes a first part having an elongated hollow bush adapted to be sunk into the edge of a door, and a second part having a pin and a colinear threaded portion, to be inserted through a door plate with said pin projecting for rotation in said bush. Identical such hinges may be fitted top and bottom, or one hinge may be replaced by a pin through a door plate engaging bushes in the door and plate and rotatable in at least one bush.

O United States Patent i191 i111 3,855,667 Messina [451 Dec. 24, 19741541 PIVOT HINGE 2,988,414 6/1961 Crowe et ai. 16/129 wel invento eineMessina, 25 Margaret So ij 1111321 ff-ii 16H36 SOUIhPQfl, 4215Queensland 3,015,126 1/1962 Ahigren 16/136 Australia 3,141,190 7/1964Reiss 16/136 [22] Filed: July 3l, 1973 Primary Examiner-Paul R. Gilliam[2l] APPL NOJ 384,369 Assistant Examiner-Doris L. Troutman Attorney,Agent, or Firm-Donald D. Jeffery [30] Foreign Application Priority DataAug. 4, 1972 Australia 9966/72 [57] ABSTRACT A concealed p1vot hingeincludes a first part having an [521 U.s. C1. 16/168 elongated hollowbueh adapted to be sunk imo the [51] im. C1 Eosd 5/10 edge of a door,and a Second Part .hai/mg a pm and o [58] Field ofsearch 16/169, 168,136, 128 A, eolmear threaded portlon, .to oe inserted throughe 16/129door plate with said pin projecting for rotation in said bush.Identical-such hinges may be tted top and bot- [56] References Citedtom, or one hinge may be replaced by a pin through a UNITED STATESPATENTS door plate engaging bushes 1n the door and plate and 1,987,516l/l935 Permi et al. 16/131 rotatable m at least one bush' 2,828,6684/1958 De Angelis 16/128 A 3 Claims, 3 Drawing Figures ,41 le A;

FIG. 1.

FIG. 3.

PIVOT HINGE This invention relates to a pivot hinge mainly, though notonly, for use on cupboard or cabinet doors.

An object of the invention is to provide such a hinge which is very easyand quick to fit and therefore economical in labour costs.

Another object of the invention is to provide a hinge which is whollyconcealed when installed.

A further object is to provide a hinge which requires no adjustment infitting and which may be applied to any point along a door or the like,for example to the vertical centreline of the door.

The invention, in one aspect, comprises a pivot hinge including twoparts, the first part including an elongated hollow bush and the secondpart including a pin rotatably engageable in the bush and a threadedportion fixed to and colinear with said pin.

The second part preferably has a screw fastening fixed to and co-linearwith said pin.

In order that the invention may be better understood, one example willbe described with reference to the accompanying drawings, in which:

FIG. 1 shows an exploded view of hinge components,

FIG. 2 shows in section a complete hinge using the components of FIG. 1mounted to a cabinet door, and

FIG. 3 shows a modification of the hinge of FIG. 2.

As shown in FIG. 1 an elongated bush 10 is provided into which a pin 1lfits rotatably.

Removal of a hinge according to the invention is also very simple,involving merely unscrewing the two pins 1l.

If it is desired that the pivoted fitting be self-closing, a helicalspring (not shown) can be incorporated in the pin-screw combination11-12 so that when the fitting is pivoted the spring is wound andreturns the fitting to unpivoted position.

Referring to FIG. 3 the lower hinge assembly A is identical with thatshown in FIG. l, the same references being used.

The upper assembly B, however, is further simplified.

A bush 17 is mounted in a hole in plate 15, and a second bush 18 in ahole in the edge of door 14. A spacing washer 19 (as before) liesbetween plate 15 and door 14. A pin 20 is rotatably engaged in bothbushes 17, 18. The upper assembly at B is thus simpler and cheaper thanthat at A. Installation of the hinge is similar to that for the FIG. 2assembly.

It will be apparent that the hinges described may be fitted in much lesstime than prior hinges and by relatively unskilled labour, since theonly tools necessary are a drill, a simple jig and a screwdriver.

Doors may be fitted without horizontal and vertical framing forindividual door openings.

The hinges are very versatile. They may be centremounted instead ofedge-mounted to give 360 swing orv may be horizontal to give lift-uphinging.

Pin l1 has an end threaded part 12 of somewhat greater diameter. A nylonwasher 13 fits over pin 1l, but abuts the end of bush 10.

As shown in FIG. 2, a door 14 is pivoted between top and bottom plates15, 16 by two of the assemblies of FIG. 1, vertically aligned with oneanother.

Installation is simply a matter of positioning door 14 as required anddrilling a hole through plate 15 or 16 and into the door edge, the drillused providing both a hole in the door to accommodate bush 10 with apush fit and a widened part in plate 15 or 16 into which screw l2 can bescrewed. The vertical alignment of the two assemblies is obtained'by useof a simple jig. Nylon washers 13 are positioned and the top and bottomassemblies screwed into place with the heads of the screws flush orcountersunk as shown. The door pivots about the common vertical axis ofboth assemblies. A nylon washer 13 serves both to space the door 14 fromplates 15 and 16 and to give a low-friction pivot. It will immediatelybe seen that mounting of the door is extremely easy and quick and thatthe pivot may be placed at any position along the door.

The pivot hinge of this invention is particularly suitable for use withparticle board constructions.

It will be clear that the invention may be used for hinging doors,windows or any other pivoted fittings either about a vertical axis asdescribed or about a horizontal axis.

What I claim is:

1. A door hingedly mounted within a door frame having top and bottomplates, an upper and lower hinge assembly; one said assembly includingan elongated hollow bush lying in a hole in an edge of said door withits outer end flush with said edge, and a part having a pin and athreaded portion colinear with said pin threaded into a hole through itsplate, said pin projecting into rotatable engagement in said bush; andthe other said assembly including a first bush lying within a holethrough its plate, a second bush lying in a hole in the edge of saiddoor with its end flush with said edge, and a pin passing through bothsaid bushes and rotatable relative to at least one bush; the axis ofsaid hinge assemblies being aligned.

2. A door as claimed in claim 1, including a spacing washer between saiddoor and each said plate, said washer surrounding said pin and abuttingthe end of each bush of the assembly.

3. A door hingedly mounted with a door frame having top and bottomplates', an upper and a lower hinge assembly, each said assemblyincluding an elongated hollow bush mounted in a hole in an edge of saiddoor with the outer end of said bush being flush with the surface ofsaid edge, a hole through the adjacent plate aligned with the holeformed in said door, said hole in said plate being threaded from the endthereof remote from said door, a part having an external thread and apin colinear with said thread and extending into said holes from saidremote end of said plate to project said pin into rotatable engagementwith said bush and to engage said external and internal threads, and awasher positioned between said door and said plate for spacing suchmembers, said washer fitting around said pin and abutting the end ofsaid bush.

1. A door hingedly mounted within a door frame having top and bottomplates, an upper and lower hinge assembly; one said assembly includingan elongated hollow bush lying in a hole in an edge of said door withits outer end flush with said edge, and a part having a pin and athreaded portion colinear with said pin threaded into a hole through itsplate, said pin projecting into rotatable engagement in said bush; andthe other said assembly including a first bush lying within a holethrough its plate, a second bush lying in a hole in the edge of saiddoor with its end flush with said edge, and a pin passing through bothsaid bushes and rotatable relative to at least one bush; the axis ofsaid hinge assemblies being aligned.
 2. A door as claimed in claim 1,including a spacing washer between said door and each said plate, saidwasher surrounding said pin and abutting the end of each bush of theassembly.
 3. A door hingedly mounted with a door frame having top andbottom plates; an upper and a lower hinge assembly, each said assemblyincluding an elongated hollow bush mounted in a hole in an edge of saiddoor with the outer end of said bush being flush with the surface ofsaid edge, a hole through the adjacent plate aligned with the holeformed in said door, said hole in said plate being threaded from the endthereof remote from said door, a part having an external thread and apin colinear with said thread and extending into said holes from saidremote end of said plate to project said pin into rotatable engagementwith said bush and to engage said external and internal threads, and awasher positioned between said door and said plate for spacing suchmembers, said washer fitting around said pin and abutting the end ofsaid bush.